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8fa5723a CZ |
1 | /* |
2 | * arch/xtensa/platforms/xt2000/setup.c | |
3 | * | |
4 | * Platform specific functions for the XT2000 board. | |
5 | * | |
6 | * Authors: Chris Zankel <chris@zankel.net> | |
7 | * Joe Taylor <joe@tensilica.com> | |
8 | * | |
9 | * Copyright 2001 - 2004 Tensilica Inc. | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify it | |
12 | * under the terms of the GNU General Public License as published by the | |
13 | * Free Software Foundation; either version 2 of the License, or (at your | |
14 | * option) any later version. | |
15 | * | |
16 | */ | |
17 | #include <linux/stddef.h> | |
18 | #include <linux/kernel.h> | |
19 | #include <linux/init.h> | |
20 | #include <linux/errno.h> | |
21 | #include <linux/reboot.h> | |
22 | #include <linux/kdev_t.h> | |
23 | #include <linux/types.h> | |
24 | #include <linux/major.h> | |
25 | #include <linux/console.h> | |
26 | #include <linux/delay.h> | |
27 | #include <linux/stringify.h> | |
28 | #include <linux/platform_device.h> | |
29 | #include <linux/serial.h> | |
30 | #include <linux/serial_8250.h> | |
31 | ||
32 | #include <asm/processor.h> | |
33 | #include <asm/platform.h> | |
34 | #include <asm/bootparam.h> | |
35 | #include <platform/hardware.h> | |
36 | #include <platform/serial.h> | |
37 | ||
38 | /* Assumes s points to an 8-chr string. No checking for NULL. */ | |
39 | ||
40 | static void led_print (int f, char *s) | |
41 | { | |
42 | unsigned long* led_addr = (unsigned long*) (XT2000_LED_ADDR + 0xE0) + f; | |
43 | int i; | |
44 | for (i = f; i < 8; i++) | |
45 | if ((*led_addr++ = *s++) == 0) | |
46 | break; | |
47 | } | |
48 | ||
49 | void platform_halt(void) | |
50 | { | |
51 | led_print (0, " HALT "); | |
52 | local_irq_disable(); | |
53 | while (1); | |
54 | } | |
55 | ||
56 | void platform_power_off(void) | |
57 | { | |
58 | led_print (0, "POWEROFF"); | |
59 | local_irq_disable(); | |
60 | while (1); | |
61 | } | |
62 | ||
63 | void platform_restart(void) | |
64 | { | |
65 | /* Flush and reset the mmu, simulate a processor reset, and | |
66 | * jump to the reset vector. */ | |
67 | ||
68 | __asm__ __volatile__ ("movi a2, 15\n\t" | |
bc5378fc | 69 | "wsr a2, icountlevel\n\t" |
8fa5723a | 70 | "movi a2, 0\n\t" |
bc5378fc MF |
71 | "wsr a2, icount\n\t" |
72 | "wsr a2, ibreakenable\n\t" | |
73 | "wsr a2, lcount\n\t" | |
8fa5723a | 74 | "movi a2, 0x1f\n\t" |
bc5378fc | 75 | "wsr a2, ps\n\t" |
8fa5723a CZ |
76 | "isync\n\t" |
77 | "jx %0\n\t" | |
78 | : | |
79 | : "a" (XCHAL_RESET_VECTOR_VADDR) | |
80 | : "a2" | |
81 | ); | |
82 | ||
83 | /* control never gets here */ | |
84 | } | |
85 | ||
86 | void __init platform_setup(char** cmdline) | |
87 | { | |
88 | led_print (0, "LINUX "); | |
89 | } | |
90 | ||
91 | /* early initialization */ | |
92 | ||
93 | extern sysmem_info_t __initdata sysmem; | |
94 | ||
95 | void platform_init(bp_tag_t* first) | |
96 | { | |
97 | /* Set default memory block if not provided by the bootloader. */ | |
98 | ||
99 | if (sysmem.nr_banks == 0) { | |
100 | sysmem.nr_banks = 1; | |
101 | sysmem.bank[0].start = PLATFORM_DEFAULT_MEM_START; | |
102 | sysmem.bank[0].end = PLATFORM_DEFAULT_MEM_START | |
103 | + PLATFORM_DEFAULT_MEM_SIZE; | |
104 | } | |
105 | } | |
106 | ||
107 | /* Heartbeat. Let the LED blink. */ | |
108 | ||
109 | void platform_heartbeat(void) | |
110 | { | |
111 | static int i=0, t = 0; | |
112 | ||
113 | if (--t < 0) | |
114 | { | |
115 | t = 59; | |
116 | led_print(7, i ? ".": " "); | |
117 | i ^= 1; | |
118 | } | |
119 | } | |
120 | ||
121 | //#define RS_TABLE_SIZE 2 | |
122 | //#define STD_COM_FLAGS (ASYNC_BOOT_AUTOCONF|ASYNC_SKIP_TEST) | |
123 | ||
124 | #define _SERIAL_PORT(_base,_irq) \ | |
125 | { \ | |
126 | .mapbase = (_base), \ | |
127 | .membase = (void*)(_base), \ | |
128 | .irq = (_irq), \ | |
129 | .uartclk = DUART16552_XTAL_FREQ, \ | |
130 | .iotype = UPIO_MEM, \ | |
131 | .flags = UPF_BOOT_AUTOCONF, \ | |
132 | .regshift = 2, \ | |
133 | } | |
134 | ||
135 | static struct plat_serial8250_port xt2000_serial_data[] = { | |
136 | #if XCHAL_HAVE_BE | |
137 | _SERIAL_PORT(DUART16552_1_ADDR + 3, DUART16552_1_INTNUM), | |
138 | _SERIAL_PORT(DUART16552_2_ADDR + 3, DUART16552_2_INTNUM), | |
139 | #else | |
140 | _SERIAL_PORT(DUART16552_1_ADDR, DUART16552_1_INTNUM), | |
141 | _SERIAL_PORT(DUART16552_2_ADDR, DUART16552_2_INTNUM), | |
142 | #endif | |
143 | { } | |
144 | }; | |
145 | ||
146 | static struct platform_device xt2000_serial8250_device = { | |
147 | .name = "serial8250", | |
148 | .id = PLAT8250_DEV_PLATFORM, | |
149 | .dev = { | |
150 | .platform_data = xt2000_serial_data, | |
151 | }, | |
152 | }; | |
153 | ||
154 | static struct resource xt2000_sonic_res[] = { | |
155 | { | |
156 | .start = SONIC83934_ADDR, | |
157 | .end = SONIC83934_ADDR + 0xff, | |
158 | .flags = IORESOURCE_MEM, | |
159 | }, | |
160 | { | |
161 | .start = SONIC83934_INTNUM, | |
162 | .end = SONIC83934_INTNUM, | |
163 | .flags = IORESOURCE_IRQ, | |
164 | }, | |
165 | }; | |
166 | ||
167 | static struct platform_device xt2000_sonic_device = { | |
168 | .name = "xtsonic", | |
169 | .num_resources = ARRAY_SIZE(xt2000_sonic_res), | |
170 | .resource = xt2000_sonic_res, | |
171 | }; | |
172 | ||
173 | static int __init xt2000_setup_devinit(void) | |
174 | { | |
175 | platform_device_register(&xt2000_serial8250_device); | |
176 | platform_device_register(&xt2000_sonic_device); | |
177 | ||
178 | return 0; | |
179 | } | |
180 | ||
181 | device_initcall(xt2000_setup_devinit); |